JP5929891B2 - Hot water unit - Google Patents

Description

  The present invention relates to a hot water unit used in a hot water supply device or the like.

  Conventionally, as a hot water supply apparatus provided with a hot water unit for generating hot water, there is one disclosed in Japanese Patent Application Laid-Open No. 2007-10241 (Patent Document 1). This hot water supply device is a heat pump type hot water supply device, a heat source unit including a compressor, a hot water supply heat exchanger, an electronic expansion valve and a heat source side heat exchanger, a hot water supply pump connected to the hot water supply heat exchanger, And a hot water supply tank unit. The water supplied to the hot water supply heat exchanger is heated by the heat exchange in the hot water supply heat exchanger, and is accumulated in the hot water supply tank unit by the hot water supply pump.

  The hot water supply pump is mounted and fixed on a bottom frame provided at the lower part of the hot water supply device housing. In that case, generally, an anti-vibration rubber is sandwiched between the mounting plate of the water heater housing and the bottom frame, and a screw is screwed onto the bottom frame from above via the mounting plate and the anti-vibration rubber. By doing so, the hot water supply pump is fixed to the bottom frame.

  However, the conventional hot water supply apparatus disclosed in Patent Document 1 has the following problems. That is, since the hot water supply pump, the mounting plate, the anti-vibration rubber, and the bottom frame are integrally and firmly fixed by the screws, a part of the vibration and vibration noise of the hot water supply pump is applied to the bottom frame. It is transmitted. Therefore, there is a problem that vibration noise cannot be eliminated particularly when the bottom frame has a sheet metal structure.

  Further, in the above-described method for fixing the hot water supply pump to the bottom frame, the hot water supply pump is fixed by screwing screws into the bottom frame from above. Therefore, the tip of the screw protrudes from the bottom frame, and there is a risk that an operator's hand may touch the tip of the screw during transportation or installation, resulting in injury. .

JP 2007-10241 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a hot water unit capable of sufficiently and safely preventing casing vibration and vibration noise resulting from vibration of a hot water pump.

In order to solve the above problems, the hot water unit of the present invention is:
A casing having a bottom frame;
A rod-like member standing and projecting inward from the bottom frame of the casing;
An elastic member having an insertion hole through which the rod-shaped member is inserted;
A mounting plate attached to the elastic member;
A hot water pump attached to the mounting plate;
A regulating member that regulates the axial movement of the rod-shaped member in the hot water pump,
The rod-shaped member is inserted with a gap between the elastic member and the inner peripheral surface of the insertion hole,
The mounting plate is attached to the elastic member in a non-contact state with the rod-shaped member ,
The hot water pump is held by a hot water supply pipe connected to the suction port of the hot water pump and a discharge pipe connected to the discharge port of the hot water pump, so that the inner peripheral surface of the insertion hole in the elastic member and the rod shape It is characterized in that a gap between the members is maintained .

  According to the said structure, the said attachment plate attached to the said hot water pump is attached to the said elastic member. And the said rod-shaped member erected and protruded in the said bottom frame is penetrated by the said insertion hole of the said elastic member. Therefore, the hot water pump is supported by the bottom frame via the mounting plate and the elastic member. In that case, since there is a gap between the inner peripheral surface of the insertion hole of the elastic member and the rod-shaped member, the elastic member is fixed to the rod-shaped member erected on the bottom frame. However, it is fixed to the bottom frame only by the weight of the hot water pump and the mounting plate.

  Therefore, the vibration of the hot water pump transmitted to the elastic member is not directly transmitted to the rod-shaped member that is separated from the elastic member. As a result, the vibration and vibration sound of the hot water pump transmitted to the bottom frame can be greatly reduced.

  Further, since the rod-like member is erected so as to protrude inside the bottom frame, the tip of the rod-like member is not exposed to the outside of the bottom frame, and an operator's hand is at the tip. You can prevent injury by touching.

  Furthermore, the movement of the rod-shaped member in the hot water pump in the axial direction is restricted by the restriction member. Therefore, when the hot water unit to which the hot water pump is attached is conveyed sideways, the hot water pump is restricted by the restricting member from moving in the axial direction of the stick member, and the elastic member comes out of the stick member. Can be prevented. As a result, it is not necessary to return the elastic member that has been removed from the rod-shaped member, and the convenience of installation work can be improved.

Moreover, in the hot water unit of one embodiment,
The elastic member includes a holding groove for holding the mounting plate.

  According to this embodiment, the attachment plate is attached to the elastic member by being held in the holding groove of the elastic member. Therefore, the attachment plate can be reliably attached to the elastic member with a simple configuration.

Moreover, in the hot water unit of one embodiment,
The hot water pump and the regulating member have a gap in the axial direction of the rod-shaped member,
The inward protruding length of the rod-shaped member is set longer than the gap between the hot water pump and the regulating member.

  According to this embodiment, since the protruding length of the rod-shaped member is longer than the gap between the hot water pump and the regulating member, the hot water pump moves in the axial direction of the rod-shaped member and contacts the regulating member. Even in contact, the elastic member integrated with the hot water pump can be prevented from coming off from the rod-shaped member.

  Therefore, when the horizontal hot water unit is raised at the transport destination, the elastic member can be returned to the original assembly state.

Moreover, in the hot water unit of one embodiment,
The rod-shaped member is a screw having a head portion and a shaft portion,
The screw is provided with a screw portion formed with a male screw that is screwed to the bottom frame at an end portion on the head side of the shaft portion, and on a portion other than the screw portion in the shaft portion. The cylindrical part which has a smooth side surface is provided, and only the said cylindrical part protrudes inside the said casing.

  According to this embodiment, by screwing the screw portion of the screw into the bottom frame, only the columnar portion on the tip side from the screw portion can be protruded to the inside of the casing. Therefore, compared with the case where a round bar is erected on the casing by caulking, the cylindrical portion of the screw can be easily erected on the casing.

  Furthermore, since the external thread is not formed in the cylindrical part of the screw, the elastic part is coupled with the clearance between the inner peripheral surface of the insertion hole of the elastic member and the cylindrical part. When the cylindrical portion of the screw is inserted through the through hole of the member, even if the cylindrical portion contacts the inner peripheral surface of the through hole, damage to the inner peripheral surface is prevented.

  Further, since the screw is erected on the bottom frame from below to above, the tip of the cylindrical portion is not exposed to the outside of the bottom frame, and an operator's hand is placed on the tip. You can prevent injury by touching.

  As is clear from the above, the hot water unit of the present invention has a gap between the inner peripheral surface of the insertion hole of the elastic member and the rod-shaped member, so that the elastic member is the hot water pump and the above It is fixed to the bottom frame only by the weight of the mounting plate.

  Therefore, the vibration of the hot water pump transmitted to the elastic member is not directly transmitted to the rod-shaped member that is separated from the elastic member. As a result, the vibration and vibration sound of the hot water pump transmitted to the bottom frame can be greatly reduced.

  Further, since the rod-like member is erected so as to protrude inside the bottom frame, the tip of the rod-like member is not exposed to the outside of the bottom frame, and an operator's hand is at the tip. You can prevent injury by touching.

  Furthermore, when the hot water unit to which the hot water pump is attached is transported sideways, the hot water pump can be restricted by the restricting member from moving in the axial direction of the stick member, and the elastic member can be removed from the stick member. Can be prevented. As a result, it is not necessary to return the elastic member that has been removed from the rod-shaped member, and the convenience of installation work can be improved.

It is a figure which shows the whole structure in the hot water unit of this invention. It is a figure which shows the attachment structure to the bottom frame of the hot water pump in FIG. It is the front view and top view of a vibration isolator rubber in FIG. FIG. 3 is a plan view of the mounting plate in FIG. 2. FIG. 3 is an enlarged plan view of an anti-vibration rubber attachment location in FIG. 2. It is a figure which shows the transition of the attachment state to the attachment board of vibration-proof rubber. It is sectional drawing which shows the state which made the screw for fixing penetrate the through-hole of vibration-proof rubber. It is a side view which shows the positional relationship of a hot water pump and a heat insulating material.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a diagram illustrating an overall configuration of the hot water unit according to the present embodiment.

  This hot water unit includes a rectangular parallelepiped casing 1, a hot water pump 2 attached and fixed to the bottom frame 1a of the casing 1, and a plate heat exchanger 3 installed on the side frame 1b side of the casing 1. It constitutes an indoor unit.

  The plate heat exchanger 3 includes a compressor, a heat source side heat exchanger, and an electric expansion valve (both not shown) that are connected in a ring shape with refrigerant pipes to form an outdoor unit, and the electric expansion valve. The heat pump is comprised between. Then, the high-temperature and high-pressure refrigerant supplied from the compressor is supplied from the refrigerant supply port 4 to the plate heat exchanger 3 through the refrigerant supply pipe 4a. On the other hand, the low-temperature and high-pressure refrigerant after heat exchange in the plate heat exchanger 3 is supplied from the refrigerant discharge port 5 to the electric expansion valve via the refrigerant discharge pipe 5a.

  The hot water pump 2 has a suction port 2 a communicating with a hot water supply port 3 a of the plate heat exchanger 3 through a hot water supply pipe 6. One end of the discharge pipe 7 is connected to the discharge port 2 b, and the other end of the discharge pipe 7 is connected to the hot water supply port 8. Further, the water inlet 3 b of the plate heat exchanger 3 and the water absorption port 9 are connected by a water absorption pipe 10.

  In the above configuration, when the heat pump is driven, the high-temperature and high-pressure refrigerant from the compressor is supplied to the plate heat exchanger 3 as described above. In the plate heat exchanger 3, heat exchange is performed with water supplied via the water absorption port 9 and the water absorption pipe 10. Then, the low-temperature and high-pressure liquid refrigerant after heat exchange is sent to the electric expansion valve. On the other hand, the hot water after heat exchange in the plate heat exchanger 3 is sucked into the hot water pump 2 from the suction port 2a through the hot water supply pipe 6 by the negative pressure generated by driving the hot water pump 2, and is discharged from the discharge port 2b to the discharge pipe 7 and the hot water supply. Hot water is supplied through port 8.

  FIG. 2 is a view showing a structure for attaching the casing 1 to the bottom frame 1a in the hot water pump 2. As shown in FIG. The hot water pump 2 is disposed on the bottom frame 1a with the rotating shaft directed in the horizontal direction. A flat mounting plate 11 is attached at a position facing the bottom frame 1a when the hot water pump 2 is disposed on the side of the bottom frame 1a.

  A fixing screw 12 is screwed into the bottom frame 1a from below at the positions corresponding to the two corners on one side of the rectangular mounting plate 11 and the center on the other side, and penetrates therethrough. Standing up. Reference numeral 13 denotes an anti-vibration rubber, which has a cylindrical shape and is formed with a through hole 13a for inserting the shaft portion of the fixing screw 12 along the central axis. Further, a horizontal clamping groove 13 b for clamping the mounting plate 11 is formed in the axially intermediate portion on the outer peripheral surface of the vibration isolating rubber 13. In other words, the fixing screw 12 constitutes the rod-like member, the vibration isolating rubber 13 constitutes the elastic member, and the through hole 13a constitutes the insertion hole.

  FIG. 3 shows a front view (FIG. 3 (a)) and a plan view (FIG. 3 (b)) of the anti-vibration rubber 13. FIG. The clamping groove 13b in which the mounting plate 11 is clamped is formed in an annular shape on the circumferential surface of the vibration-proof rubber 13 with a predetermined thickness remaining between the through-hole 13a.

  FIG. 4 shows a plan view of the mounting plate 11. The mounting plate 11 has a substantially rectangular shape, and is provided at three locations, one end of the two sides 11d and 11e facing each other and the center of the one side 11f between the other ends of the two sides 11d and 11e. A U-shaped groove 11a for inserting the vibration isolating rubber 13 is formed at the edge. FIG. 5 shows a plan view of the attachment location of the anti-vibration rubber 13 on the attachment plate 11. The U-shaped groove 11 a extends in a direction perpendicular to the edge of the mounting plate 11 that forms a straight line, and the width thereof is the same as the inner diameter d of the holding groove 13 b of the vibration-proof rubber 13. And the circular area | region 11b notched by the circular shape whose diameter is a little larger than d is formed in the outermost part of the U-shaped groove | channel 11a. An inclined region 11c for facilitating the insertion of the anti-vibration rubber 13 is formed at the entrance of the U-shaped groove 11a.

  FIG. 6 is a diagram showing the transition of the mounting state of the vibration-proof rubber 13 to the mounting plate 11. First, as shown in FIG. 6 (a), the clamping groove 13b of the anti-vibration rubber 13 is fitted in the inclined regions 11c on both sides of the U-shaped groove 11a in the mounting plate 11 in the direction of the arrow. Further, as shown in FIG. 6 (b), the vibration isolating rubber 13 is pushed into the mounting plate 11. Thus, as shown in FIG. 6 (c), when the anti-vibration rubber 13 is inserted to the back of the U-shaped groove 11 a of the mounting plate 11, the through-hole 13 a of the anti-vibration rubber 13 is substantially the same as the circular region 11 b of the mounting plate 11. It will be located in the center.

  In this way, the fixing screw 12 that is erected by being screwed into the bottom frame 1a is inserted into the through hole 13a of the vibration isolating rubber 13 attached to the mounting plate 11 of the hot water pump 2 from below to above. Insert it through. Thus, the hot water pump 2 is received from the lower side by the bottom frame 1a through the mounting plate 11 and the vibration isolating rubber 13.

  FIG. 7 is a cross-sectional view showing a state in which the fixing screw 12 is inserted through the through hole 13a of the vibration isolating rubber 13. As shown in FIG.

  In FIG. 7, the fixing screw 12 is composed of a head portion 12a and a rod-shaped shaft portion 12b. Furthermore, the shaft portion 12b is composed of a screw portion 12c and a cylindrical portion 12d. The screw portion 12c is located on the head portion 12a side of the shaft portion 12b, the axial length is substantially equal to the thickness t of the bottom frame 1a, and a male screw 14 is formed on the outer peripheral surface. On the other hand, a hole for attaching the fixing screw 12 is formed at the attachment position of the anti-vibration rubber 13 on the bottom frame 1a, and a female screw 15 that is screwed into the male screw 14 of the screw portion 12c is formed in the hole. . Then, by screwing the male screw 14 of the fixing screw 12 with the female screw 15 of the bottom frame 1a, the fixing screw 12 can be erected with respect to the bottom frame 1a to project the cylindrical portion 12d. .

  The cylindrical portion 12d is not formed with a male screw on its outer peripheral surface, and is simply formed in a cylindrical shape. The diameter d2 of the cylindrical portion 12d is set smaller than the diameter d1 of the through hole 13a of the vibration isolating rubber 13. Specifically, for example, the diameter d2 of the cylindrical portion 12d of the fixing screw 12 is 4 mmφ, whereas the diameter d1 of the through hole 13a of the vibration isolating rubber 13 is 6.5 mmφ. In this way, when the fixing screw 12 is inserted into the through hole 13a of the vibration isolating rubber 13, coupled with the fact that the external thread is not formed on the cylindrical portion 12d, the inner peripheral surface of the through hole 13a is the cylindrical portion. Even if it contacts 12d, damage to the inner peripheral surface due to a male screw or the like is prevented.

  As described above, in the present embodiment, the anti-vibration rubber 13 attached to the attachment plate 11 of the hot water pump 2 is not actually fixed to the fixing screw 12 standing on the bottom frame 1a. Instead, it is fixed to the bottom frame 1 a only by the weight of the hot water pump 2 and the mounting plate 11. Therefore, the vibration of the hot water pump 2 transmitted to the vibration isolating rubber 13 is not directly transmitted to the fixing screw 12 that is separated from the vibration isolating rubber 13. As a result, the vibration and vibration sound of the hot water pump 2 transmitted to the bottom frame 1a can be greatly reduced. Further, since the fixing screw 12 is erected on the bottom frame 1a from below to above, the tip end portion of the fixing screw 12 is not exposed to the outside of the bottom frame 1a, and an operator can be attached to the tip portion. You can prevent your hands from touching and getting injured.

  By the way, when the hot water unit to which the hot water pump 2 is attached as described above is transported, it is often set sideways because it is vertically long. In that case, since the anti-vibration rubber 13 is inserted through the fixing screw 12 and is not actively fixed, the fixing screw 12 serves as a guide when the hot water unit is inclined. The hot water pump 2 tries to move in the axial direction of the fixing screw 12. In that case, since only the hot water supply pipe 6 and the discharge pipe 7 can prevent the movement, the movement cannot be completely prevented, and the vibration isolating rubber 13 may come off from the fixing screw 12 in some cases. When the horizontal hot water unit is raised at the transport destination, the anti-vibration rubber 13 that has come out of the fixing screw 12 does not return to the position of the original fixing screw 12, but remains in the state that it has been removed from the fixing screw 12. May be. In that case, the vibration and vibration sound of the hot water pump 2 transmitted to the bottom frame 1a become large, and the work of returning the vibration isolating rubber 13 that has come off from the fixing screw 12 becomes necessary.

  Therefore, in the present embodiment, the vibration-proof rubber 13 is prevented from coming off during conveyance by the following configuration.

  That is, in FIG. 1, a foamed polystyrene heat insulating material 17 is disposed around a hot water supply tank 16 to which hot water discharged from the discharge port 2 b of the hot water pump 2 is supplied for heat insulation and positioning. FIG. 8 is a side view of the hot water pump 2 showing the positional relationship between the hot water pump 2 and the heat insulating material 17. When the hot water pump 2 moves to the rear of the shaft of the fixing screw 12, the end surface 2 c and the upper surface 2 d of the hot water pump 2 are received at a position of the heat insulating material 17 facing the end surface 2 c and the upper surface 2 d of the hot water pump 2. Thus, an L-shaped restricting portion 18 that restricts movement is formed. Further, the restricting portion 18 is provided with an upper receiving surface 18a as an example of the restricting member that receives the upper surface 2d of the hot water pump 2 moved to the rear side of the shaft of the fixing screw 12. The distance L2 between the upper surface 2d of the hot water pump 2 and the upper receiving surface 18a of the heat insulating material 17 is set to be smaller than the length L1 of the cylindrical portion 12d (see FIG. 7) of the fixing screw 12.

  In this way, when the hot water unit to which the hot water pump 2 is attached is conveyed sideways, the amount of movement of the hot water pump 2 in the axial direction of the fixing screw 12 is L2 at the maximum. Therefore, when the hot water pump 2 moves by L2 and comes into contact with the upper receiving surface 18a of the heat insulating material 16, the length L1 of the cylindrical portion 12d of the fixing screw 12 is larger than the maximum moving amount L2 of the hot water pump 2. Since it is set, the vibration-proof rubber 13 is prevented from coming off from the fixing screw 12.

  Therefore, when the horizontal hot water unit is raised at the transport destination, the anti-vibration rubber 13 of the hot water pump 2 can be returned to the original assembled state without coming out of the fixing screw 12. As a result, the work of returning the anti-vibration rubber 13 that has come off from the fixing screw 12 becomes unnecessary, and the convenience of the installation work can be improved.

  In the present embodiment, the plate heat exchanger 3 is mounted in the hot water unit. However, this is not necessarily required in the present invention, and the plate heat exchanger 3 may be installed on the outdoor unit side outside the hot water unit.

  In the present embodiment, the mounting plate 11 is clamped by the clamping groove 13b formed on the outer periphery of the vibration isolating rubber 13. However, the present invention is not limited to this. For example, the mounting plate 11 may be placed and fixed on the upper end surface of the vibration isolating rubber 13. In short, the attachment plate 11 only needs to be attached to the anti-vibration rubber 13 in a non-contact state with the fixing screw 12.

  Further, in the present embodiment, the holding groove 13 b of the vibration isolating rubber 13 is formed in an annular shape on the peripheral surface of the vibration isolating rubber 13. However, the present invention is not limited to this shape, and may be any shape as long as the straight portion of the U-shaped groove 11a formed on the edge of the mounting plate 11 can be inserted. For example, it may be formed in parallel at two locations facing each other across the through hole 13a. Or you may form so that the circumference | surroundings 3 direction of the through-hole 13a may be enclosed.

  Further, in the present embodiment, when the hot water unit is conveyed sideways, the hot water pump 2 is provided on the heat insulating material 17 of the hot water tank 16 as a regulating member that restricts the movement of the hot water pump 2 in the axial direction of the fixing screw 12. The upper receiving surface 18a of the restricting portion 18 is formed. However, it is not limited to the heat insulating material 17, and may be formed in one direction even if formed on other members.

  In the present embodiment, the fixing screw 12 is used as the rod-shaped member. However, the present invention is not limited to this, and a rod-like body having a circular cross section that is erected on the bottom frame 1a by caulking (press fitting) may be used. However, in the case of the fixing screw 12, it is only necessary to screw the screw portion 12c into the bottom frame 1a, and the cylindrical portion 12d of the fixing screw 12 can be easily set up on the bottom frame 1a as compared with the case of caulking. Can be installed.

  In the present embodiment, the anti-vibration rubber 13 is used as the elastic member, but an elastic body other than rubber or a viscous fluid injection member may be used.

1 ... casing,
1a ... bottom frame,
2 ... hot water pump,
3 ... Plate heat exchanger,
11 ... Mounting plate,
11a ... U-shaped groove,
11b ... circular area,
12 ... Fixing screw,
12a ... head,
12b ... shaft part,
12c ... screw part,
12d ... cylindrical part,
13 ... Anti-vibration rubber,
13a ... through hole,
13b: holding groove,
14 ... male screw,
15 ... Female thread,
16 ... Hot water tank,
17 ... heat insulation material,
18 ... Regulatory Department,
18a ... Upper receiving surface.

Claims (4)

A casing (1) having a bottom frame (1a);
A rod-like member (12) erected on the bottom frame (1a) of the casing (1) so as to protrude inward;
An elastic member (13) having an insertion hole (13a) through which the rod-like member (12) is inserted;
An attachment plate (11) attached to the elastic member (13);
A hot water pump (2) attached to the mounting plate (11);
A regulating member (18a) for regulating the axial movement of the rod-like member (12) in the hot water pump (2),
The rod-like member (12) is inserted with a gap between the elastic member (13) and the inner peripheral surface of the insertion hole (13a),
Said mounting plate (11) is a rodlike member (12) in a non-contact state, with attached to the elastic member (13),
The hot water pump (2) is connected by a hot water supply pipe (6) connected to the suction port (2a) of the hot water pump (2) and a discharge pipe (7) connected to the discharge port (2b) of the hot water pump (2). ), The gap between the inner peripheral surface of the insertion hole (13a) in the elastic member (13) and the rod-like member (12) is maintained. Hot water unit. The hot water unit according to claim 1,
The hot water unit, wherein the elastic member (13) includes a clamping groove (13b) for clamping the mounting plate (11). In the hot water unit according to claim 1 or 2,
The hot water pump (2) and the regulating member (18a) have a gap in the axial direction of the rod-like member (12),
The hot water unit according to claim 1, wherein the inward protruding length of the rod-shaped member (12) is set longer than the gap between the hot water pump (2) and the regulating member (18 a). In the hot water unit according to any one of claims 1 to 3,
The rod-like member (12) is a screw having a head portion (12a) and a shaft portion (12b),
The screw (12) has a threaded portion (12c) in which a male screw (14) that is screwed into the bottom frame (1a) is formed at an end of the shaft portion (12b) on the head (12a) side. ) Is provided on the shaft portion (12b) other than the screw portion (12c), and a cylindrical portion (12d) having a smooth side surface is provided, and only the cylindrical portion (12d) is the above-described portion. A hot water unit characterized in that it protrudes inside the casing (1).

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